Roll for interfolding paper



S. J. CAMPBELL ROLL FOR INTERFOLDING PAPER Aug. 9, 1932.

2 Sheets-Sheet 1 Filed March 26, 1931 INI/EN TOR.

$4717 ae//luv/-e// Bygdze JUS/@LW A TTORNEY l ZW Aug- 9. A1932- s. J. CAMPBELL 1,871,30!

ROLL FOR INTERFOLDING PAPER Filed March 26, 1951 2 Sheets-Sheet 2 vif/1111111 g5 1.5M 2517 INVENTOR.

ATTORNEY Patented Aug. 9, 1932 UNITED STATES PATENT oFFlcE SAMUEL J'. CAMPBELL, OF GREEN BAY, WISCONSIN, ASSIGNOR T0 HUDSON-SHARP MACHINE COMPANY, 0F GREEN BAY, WISCONSIN, A CORPORATION OF WISCONSIN A ROLL FOR INTERFOLDING PAPER Application led March 26, 1931.` Serial No. 525,366.

This invention relates to improvements in rolls for interfolding paper.

The rolls of the present invention are intended for usein a paper folding machine.l of

the type which employs companion rolls provided with co-operating grippers and tuckers alternately arranged on the respective rolls in such a way as to grip the paper web or webs first onto one roll and then lonto the other in giving to the paper a zigzag stacked formation.`

The general structure of a machine of this character is well understood in the art, and the rolls of the present invention are adapted to be employedvin connection with any machine of this general character, so that a full description of the machine in its entirety is' not deemed necessary.

The present invention is directed in particular to the formation of the stationary and movable jaws constituting a vise or gripper, and to the method of mounting and operating the movable jaws, and also to the method of pivoting the tuckers to co-operatc more effectively with the aw members in introducing the paper folds into the jaws.

In previous constructions with which I am familiar, it has been customary to individually pivot the movable jaws and to provide mechanism for individually operating each of the movable jaws in proper sequence, but the present invention differs from others in that all of the movable jaws of each roll are carried upon a rotatable sleeve in suon a way that a rotation of the sleeve itself willactuate the several movable jaw sections, which simplifies the construction and method of operation and renders the action of the machine more certain and effective.

The invention is also directed to the provision of spring backings for the respective pivoted tuckers and the arrangement of the latter for'the purpose of securing a novel method of coaction with the gripper jaws as the paper folds are being introduced, and

thereafter as the tucker retracts from between .the aws. v

Further details will appear from the description of the invention, in conjunction with the accompanying drawings, wherein,-

Figure l is a cross sectional elevation of a i section of one of the rolls with the gears associated therewith.

Each of the rolls of a pair comprises an inner spindle 10 upon which is rotatably mounted a cylindrical sleeve l1; and each of the rolls in the form shown is constructedV to mount four grippers and four tuckers arranged in alternating relation to one another, and the companion rolls are so disposed that the tuckers on one of the rolls will coact with the grippers on the companion roll.

Each of the spindles is of generally cylindrical formation to afford a mounting for the rotatable sleeve 11, but the cylindrical formation of each spindle near each end thereof is interrupted by the incutting of the spindle to afford a recess having a plane i nner face l2, which plane faces, as shown, are four in number and stand in right angle relation to one another.

Thel plane faces are separated by projecting uncut portions 13, each constituting portions of the uncut cylindrical spindle, and cach of the projecting portions 13 is undercut at 14: to afford an interlock for the mounting of a longitudinally extending block 15, which tits into the recess and is configured to afford, in each instance,'the portion of the fixed jaw of a gripper, and also to afford a mounting for one end of the tuckers.

The aligned companion blocks l5 are connected, at each end of the spindle, by a bridge portion 16, which is cylindrically curved on its inner and outer faces and which overlies the surface of the sleeve 11, which sleeve surrounds the body of each of the blocks 15 and is provided with a slot 17 in the vicinity of each ofthe blocks, to afford the necessary clearance to permit the sleeve to have a limited degree of rotation around the inner spindle and inside of the four bridge portions 16.

Each of the bridge portions terminates in.

al fixed jaw face 18 which is obliquely disposed With respect to a plane tangent to the lcylindrical exterior surface, and each of the .opposite ends of a tucker bar 21 which carries a bevel faced tucker 22. Each tucker bar is provided with ears 23 which embrace the ends of the contiguous block 15 and receive a pintle 24 entered through the block and through the ears, which affords a pivotal mounting -for the tucker bar at each end of the roll.

The block 15 is provided with a squared recess 25, and the face of the sleeve is grooved to afford necessary clearance to permit the tucker bar to rock slightly, although normally1 the leading face of the bar, as regards the direction of rotation, will be held in contact with the squared incut face of the block, which limits the rocking movement in the forward direction, whilea movement. in the rearward direction is limited by the contiguous face of'the proximate fixed jaw 20.

The rear face of each tucker bar and the forward face of the proximate fixed jaw are each recessed to receive a coil spring 26 which normally holds the tucker bar in advanced relation and in contact with the squared faces of the'blocks 15 which pivot the bar. f

Each of the blocks 15 is rigidly secured to the spindle 10 by fillister head screws 27, and a further interlock is afforded bythe provision on each of the blocks of a fiange 28 Which enters the undercut groove 14.

Each of the spindles 10 is suitably mounted on bearings 29 and each is provided with a keyed gear 30 near the bearing. The gears 30 respectively mesh with gears 31 which are keyed on spindles 32, each of which has keyed thereon a collar 33 which pivots a bell crank 34 provided at its end with a -roller 35 riding upon a fixed cam 36 having on its inner face recurrent protuberances 37 and intervening valleys 38.

The bell crank 34 terminates in an inner arm 39 (shown in dotted lines in Fig. 3) Which works within a slot in the face of a gear 40, which rotates with the spindle 32 but is mounted to have limited independent rotation on said spindle when actuated by the rocking of the bell crank.

The gear 40 meshes with gear teeth 41 cut in the end of the sleeve 11. Suitable spring mechanis1n,lnot shown, is provided for forcing the bell crank roller 35 in contact with the undulating face of the fixed cam 36.

These mechanisms are duplicated in connectionwith both of the interfolding rolls, and the paper is ultimately delivered in folded condition to a receptacle or guide 42, within which it is stacked.

Operation The paper to be folded, or interfolded as the case may be, is delivered between the rolls either in the form of a continuous web or in the form of severed and overlapped sections in a manner well understood in the art to which the present invention relates. For purposes of description, we may assume that a continuous web is being acted upon.

The two rolls 4are so related with the Wedge-shaped tuckers that one of the rolls Will arrive at the ypoint of closest approach between the rolls simultaneously with the arrival of one of the sets of gripper aws on the companion roll. At this instant, the gripper jaws Will stand open, as indicated at the right in Figure 1, and a fold of the paper web Will, be forced in between the open jaws by the action of the tucker. Immediately thereafter, a rotation of the sleeve 11 Will occur under the regulation aorded bythe cam, and this will cause the movable jaw involved in the instant gripping operation to move upwardly. or in closing relation toward the fixed jaw.

rIhe edge of the movable jaw during this operation will bear against the forward bev eled face of the tucker, and in closing will have the effect of causing the edge of the tucker to ride closely or snugly against the beveled forward face of the coacting fixed jaw so as t-o hold the paper firmly against the fixed jaw during the recession of the movablejaw, and these parts are so Acorrelated that the tucker will be released at the lsame instant that the movable jaw reaches yits final gripping position, as indicated in Fig. 2. The movements involve the resultant of several operations,including the movements of rotation of the respective rolls with the resulting recession of thejaws and tucker from one another after they have passed the medial plane, together with the gripping movement imparted to the movable jaw by the rotation of the sleeve in reverse direction to the general rotation of the roll as a Whole.

In order to accommodate these movements and to maintain the edge of the tucker in firm contact with the gripping face of the fixed jaw, the tucker bars are pivoted and spring back so that the tucker bars will yield to the pressure exerted by the closing of the movable avv and assume the position prior to the instant of release as shown in Fig. 2, in which it will be noted that the spring has been com- Gil pressed and the tucker bar swung backwardly to the limit of its movement. Immediately after the parts have passed the position shown in Fig. 2, the tucker bar will clear the edge of the movable jaw and snap back into its normal position as shown in Figure 1.

The pivoting of the tucker bars andthe method of actuating them by the closing of the movable jaws is of particular import-ance in that it lholds the paper uniform and tight and does not permit it to withdraw from the gripper as the jaws are closing, which results in the formation of a neat and uniform folding of the paper.

With the gear assembly shown in Fig. 3, the spindles, rotating uniformly and in opposite directions, will impart rotation to the spindles 32 with the collars and gears mounted thereon, but as the bell crank rollers ride over the Xed cams, the inner bell crank arms will be swung in a direction to impart a supplemental rotary movement to thev gears 40, which, compounded with the general rotating movement of the interfolding rolls, will rotate the sleeves sutiiciently to close and thereafter open the movable jaw members in timed relation to the rotation of the rolls. In this way the movable jaws are enabled to properly coact with the tucker blades so that they will impart the proper swinging movement to the tuckers requisite to firmly hold the paper folds during the gripping interval and until the jaws have completely closed, at which instant the tucker will be released.

The arrangement is one which may be successfully embodied in rolls of any desired size, but is peculiarly adaptable to the requirements'of rolls of small diameter, and involves a simplification Yof construction in comparison with structures in which the movable jaws are individually mounted and operated, since in the present instance all of the jaws ofeach roll are carriedfupon the rotatable sleeve and are properly correlated to open and close at proper intervals to grip andrelease the paper web (or websections) at the required intervals. Y

The arrangement also involves a ruggedness in construction and a perfection in mechanical detail which is diiicult to attain where individual mountings are provided for the respective jaws.

Although the invention has been described with particularity as to detail, it is not the intentlon to limit the invention save as indicated in the claims, since variations in detail can be introduced without departure from the spirit of the invention.

Iclaim:

l. In mechanism of the class described, the combination of a pair of co-operating interfolding rolls mounted for opposite rotation with respect to one another andeach provided -with alternate tuckers and grippers, each of the grippers consisting of a fixed jaw member and a movable jaw member, and a. mounting for all of the movable jaw members of a roll, said mounting being rotatably mounted on its roll, and means for imparting a movement of rotation to said mounting in` timed relation to the rotation of the rolls to close and tion to the advance and recession of the tuckers.

2. In mechanism of the class described, the combination of a pair of co-operating interfolding rolls mounted for opposite rotation with respect to one another-- and each provided with alternate tuckers and grippers, each of the grippers consisting of a fixed jaw member and a movable jaw member, and a mounting for all of the movable jaw members of a roll, said mounting being rotatably mountedon its roll, and means for imparting a movement of rotation to said mounting in timed relation to the rotation of the rolls to close and thereafter open the grippers in timed relation to the advance and recession of the tuckers, and each of the tuckers being pivotally mounted and adapted to yield under contact of the coacting movable jaw.

3. In mechanism of the class described, the combination of a pair of co-operating interfolding rolls mounted for opposite rotation with respect to one another andxeach provided with alternate tuekers and grippers, each of the grippers consisting of a fixed 'jaw member and a movable jaw member, and a mounting for all of the movable jaw members of a roll, said mounting being in the form of a sleeve rotatably mounted on its roll, and means for imparting a movement of rotation to said mounting in timed relation to the rotation of the rolls to close andv thereafter open the grippers in timed relation to the advance and recession of the tuckers.

4. In mechanism of the class described, the combination of a. pair of co-operating interfolding rolls mounted for opposite rotation with respect to one anotherV and each thereafter open the grippers in timed relaprovided with alternate tuckers and grippers, each -of the grippers consisting of a` fixed jaw member a d a movable jaw memberand a mountingl for all of the movable jaw members of a roll, said mounting being in the form of a sleeve rotatably mounted on its roll, and means for imparting a movement of rotation to said mounting in timed relation to the rotation of the rolls to close and` thereafter. open the gripp'ers in timed relation to the advance and recession of the tuckers, and each aof the'tuckers being pivotally mounted and adapted to yield under contact of the coacting movable jaw.

5. Inmechanism of the class described, the combination of companion rolls mounted for rotation in opposition to one another, each of the rolls comprising an inner spindle of generally cylindrical surface contour and having companion recesses cut therein near its opposite ends, a sleeve rotatably mounted upon the cylindrical surface of the spindle, companion blocks rigidly secured Within the-companion recesses at opposite ends of the spindle, each pair of blocks being connected by a bridge member overlying the sleeve and constituting the fixed jaw of a gripper, co-operating movable jaws carried by the sleeve, tucker bars provided with outwardly projecting tucker blades, said bars being carried by the blocks, and means for imparting timed movements of rotation to.

the sleeves of each roll to effect closing and opening of the grippers in harmonized relation to the coaction of the tuckers in gripping and releasing the paper.

4 6. In mechanism ofthe class' described, the combination of companion rolls mounted for rotation in opposition to one another, each of the rolls comprising an innerl spindle of generally cylindrical surface contour and having companion recesses cut therein near its opposite ends, a sleeve rotatably mounted upon the cylindrical surface of the spindle, companion bloclrs rigidly secured within the companion recesses at opposite ends of the spindle, each pair of blocks being connected by a bridge member overlying the sleeve and constituting the fixed jaw of a gripper, the jaw face standing in oblique relation to the tangent plane ofthe proximate surface, co-operating movable jaws carried by the sleeve and having complementary obliquely disposed gripping faces, tucker bars provided with outwardly projecting tucker blades, said bars being carried by the blocks, and means for imparting timed movements of rotation to the sleeves of each roll to effect closing and opening of the grippers in harmonized relation to the coaction of the tuckers in gripping and releasing the paper.

7. In mechanism of the class described,

the combination of companion rolls mounted for rotation in opposition to one another, each of the rolls comprising an inner spindle of generally cylindrical surface contour and having companion recesses cut therein near its opposite ends, a sleeve rotatably mounted upon the cylindrical surface of the spindle,r` companion blocks rigidly secured Within the companion recesses at opposite ends of the spindle, each pair of blocks being connected by a bridge member overlying the sleeve and constituting the fixed jaw of a gripper,`cooperating movable jaws carried by the sleeve, tricher bars provided with outwardly projecting tucker blades, said bars being pivoted to the blocks and adapted to oscillate with `respect thereto, and means for imparting timed movements of rotation to the sleeves of each roll to effect closing and opening of the grippers in harmonized relation to the coaction of the tuckers in gripping and releasing the paper.

8. In mechanism of the class described,- the combination of companion rollsl mounted for rotation in opposition to one another', each of the rolls comprising an inner spindle of generally cylindrical surface contour and having companion recesses cut therein near its opposite ends, a sleeve rotatably .mounted upon the cylindrical surface of the spindle, companion blocks rigidly secured Within the companion recesses at opposite ends of the spindle, each pair of blocks being connected by a bridge member overlying the sleeve and constituting the fixed jaiv of a gripper, the jaw face standing in oblique relation to the tangent `plane of the proximate surface, cooperating movablc jaws carried by the sleeve and having complementary obliquely disposed gripping facestucker bars provided with outwardly projecting tucker blades, said bars being pivoted to the blocks and adapted to oscillate with respect thereto, and means for imparting timed movements of rotation to the sleeves of each roll to eect closized relation to the coaction of the tuckers Vin gripping and releasing the paper.

9. In mechanism vof the class described, the combination of companion rolls mounted for rotation in opposition to one another, each of the rolls comprising an inner spindle of generally cylindrical surface contour and having companion recesses cut therein-near its opposite ends, a sleeve rotatably mounted upon the cylindrical surface of the spindle, companion blocks rigidly recured Within the companion recesses at opposite ends of the spindle, each pair of blocks being connected by a bridge member overlying the sleeve and constituting the fixed jaw of a gripper, co-operating movable jaivs carried by the sleeve, tucker bars provided with outwardly projecting tucker blades, said bars being pivoted to the blocks and adapted to oscillate with respect thereto, and means for imparting timed movements of rotation to the sleeves of each roll to effect closing and opening of the grippers in harmonized relation to the coaction of the tuckers in gripping and releasing the paper, and springs interposed between the tucker bars and the fixed jaw members carried by the sleeve for permitting yielding of the tuckers under pressure imparted by the movable jaw members.

10. In mechanism of the class described, the combination of companion rolls mounted for' rotation in opposition to one another, each of theA rolls comprising an inner spindle of generally cylindrical surface contour and having companion recesses out therein near its opposite ends, a sleeve rotatably mounted upon the cylindrical surface of the spindle, companion blocks rigidly secured Within the companion recesses at opposite ends of the spindle, each pair of blocks being connected by a bridge member overlying the sleeve and constituting' the fixed jaw of a gripper, the jaw face standing in oblique relation to the tangent plane of the proximate surface, co-operating movable jaws carried by the sleeve and having complementary obliquely disposed gripping faces, tucker bars provided with outwardly disposed tucker blades, said bars being pivoted to the blocks and adapted to oscillate with respect thereto, and means for imparting timed movements of rotation to the sleeves of each roll to effect closing and opening of the grippers in harmonized relation to the eoaction of the tuckers in gripping and releasing the paper, and springs interposed between the tucker bars and the fixed jaw members carried by the sleeve for permitting yielding of the tuckers under pressure imparted by the movable jaw members.

11. In mechanismv of the class described, the combination of companion rolls mounted for opposed rotation with respect to one another, each of the rolls comprising a spindle having a sleeve rotatably mounted thereon, fixed jaw members rigidly secured to the spindle and having jaw faces overlying the surface of the sleeve, co-operating movable jaw members carried by the sleeve, tuckers carried by the spindle and provided with bevel faced tucke'r blades adapted to enter between the jaw members. the forward bevel face of the tucker being adapted for engagement by the edge of the coacting movable jaw, and the edge of the tucker blade being adapted to ride upon the face of the fixed j aw, and means for imparting timed rotation to the sleeve to effect closing and opening movements of the gripper jaws in gripping and releasing the paper.

12. In mechanism of the class described,

the combination of companion rolls mountedfor opposed rotation with respect to one. another, each of the rolls comprising a spindle having a sleeve rotatably mounted thereon, fixed jaw members rigidly secured to the spindle and having jaw faces overlying the surface of the sleeve, co-operating movable jaw members carried by the sleeve. tuckers carried by the spindle and provided with bevel faced tucker blades adapted to enter between the j aw members. the forward beveled face of the tucker being adapted for engagement by the edge of the coacting movable jaw. and the edge of the tucker blade adapted to ride upon the face of the fixed jaw, a yieldable mounting for each of the tuckers to permit yielding of the tucker under contact of the movable jaw against the forward face of the tucker blade, and means for imparting timed rotation to the sleeve to effect closing and opening movements of the gripper jaws in gripping and releasing the paper.

13. In mechanism of the class described,

the combination of rolls each provided with alternating grippers and tuckers, each of the grippers comprising a fixed jaw and a movable jaw, and each of the tuckers being yieldably mounted in position to be engaged and forced back by the coacting movable j aW during its release from between the jaws of the gripper.

14. In mechanism of the class described, the combination of rolls each provided with alternating grippers and tuckers, each of the grippers comprising a fixed jaw and a movable jaw, and each of the tuckers being pivotally mounted in position to be engaged and forced back by the coacting movable jaw during its release from between the jaws of the gripper.

15. In mechanism of the class described, the combination of a pair of oppositely rotating rolls each provided with alternating grippers and tuckers, each of the grippcrs consisting of a fixed jaw and a movable jaw, the gripping faces of said jaws standing in oblique complementary relation to the tangent plane of the proximate roll surface and each of the tuclrers having a bevel faced blade, the forward beveled face of the tuckcr being positioned to be engaged by the edge of the coacting movable gripper jaw and the edge of the tucker being adapted to ride upon the obliquely disposed surface of the companion fixed jaw, and a yieldable mounting for each tuclrer to permit the blade thereof to yield to movements imparted thereto by the coacting movable jaw.

SAMUEL J. CAMPBELL. 

